CMMVC8570E A subsidiary volume may only be mapped to hosts of type adminlun.
Explanation
An attempt was made to map a subsidiary volume to a host that wasn't an adminlun type. Subsidiary LUN mappings are typically created or removed by the IBM® Spectrum Control Base Edition application. These mappings apply only to adminlun host types, and so it is unlikely that a storage administrator would encounter this message.
User response
Contact IBM Support.